CN105668638B - A kind of nano material and its preparation method and application - Google Patents

A kind of nano material and its preparation method and application Download PDF

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Publication number
CN105668638B
CN105668638B CN201610032681.9A CN201610032681A CN105668638B CN 105668638 B CN105668638 B CN 105668638B CN 201610032681 A CN201610032681 A CN 201610032681A CN 105668638 B CN105668638 B CN 105668638B
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presoma
nanometer
reaction
ethylene glycol
microwave
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CN105668638A (en
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桂阳海
赵建波
郭智荣
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Zhengzhou University of Light Industry
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Zhengzhou University of Light Industry
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G41/00—Compounds of tungsten
    • C01G41/02—Oxides; Hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM

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  • Organic Chemistry (AREA)
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Abstract

The present invention relates to a kind of nano material and its preparation method and application.The material is a nanometer WO3Presoma and sintered body paraxylene gas show excellent air-sensitive performance.The present invention is dissolved into ethylene glycol solvent by tungsten source of tungsten hexachloride, and with ammoniacal liquor as precipitating reagent, under stirring condition, using heating using microwave, 170 190 DEG C carry out reacting 50 80min in gas-liquid interface, obtain the nanometer WO with gear-like3Presoma, presoma after 2h is calcined at 450 550 DEG C, obtains the face nest shape nanometer WO with interstitial hole in atmosphere3Sintered product, the presoma and the equal paraxylene gas of sintered product show excellent air-sensitive performance, the method has reaction quick, the advantages of energy-conservation and reduces cost, obtained dimethylbenzene gas sensor has operating temperature low, sensitivity is high, and selectivity is good, the advantages of response/recovery time is short.

Description

A kind of nano material and its preparation method and application
Technical field
The present invention relates to technical field of nano material, and in particular to a kind of nano material and its preparation method and application.
Background technology
Nano tungsten trioxide (WO3) as a kind of wide band gap semiconducter because its unique physics and chemical property (are such as used for Gas sensor, photocatalysis, electrochromic device and photoelectric device etc.) and cause the extensive concern of people.Nanometer WO3Itself is tied Structure is complicated, and thing is mutually various, to nanometer WO3Topographic design and control synthesis be even more and cause the broad interest of people.WO3Nanometer Piece, WO3Nano wire and WO3Nanotube all has been reported that.National inventing patent (CN201410110388) is reported with rule six The amino functional NH of square sheet-like morphology2- SBA-15 is template, is tungsten source with phosphotungstic acid, is sintered after being stirred in alcoholic solution and obtained Hexagonal flake tungstic acid with regular morphology, prepared tungstic acid shows excellent air-sensitive to hydrogen sulfide gas Characteristic, synthetic method craft is simple, and required equipment is uncomplicated.
National inventing patent (CN201510266119) reports a kind of template-free method and prepares tungsten oxide nanometer rod array Method, deionized water and absolute ethyl alcohol is mixed and add Na after being made into reaction dissolvent2WO4·2H2O solids are stirred, and are added Oxalic acid solid mixes, and finally adjusts pH value of solution to highly acid, and resulting solution is obtained into aqua oxidation tungsten nanometer rods battle array through hydro-thermal method Row, realize the preparation without aqua oxidation tungsten nanometer stick array under the conditions of template, and simplification of flowsheet has by the way that the method is prepared The aqua oxidation tungsten nanometer stick array of special nanometer stick array structure, with more excellent physical and chemical performance, and the method The pre-treatment of high temperature, calcining etc is needed not move through, synthesis temperature is relatively low, so as to reduce reaction cost.But conventional hydrothermal or The usual soaking time of solvent thermal process is all in even tens hours ten a few houres, and short time consumption is long, and energy consumption is big, and solute is heated presence The shortcomings of time difference.
Dimethylbenzene is mainly manufactured by crude oil in petrochemical process, and it is widely used in the diluent of pigment, paint etc., print Brush, rubber, the solvent of leather industry.As cleaning agent and degreasing agent, a kind of composition of aviation fuel, chemical plant and synthesis The raw material and intermediate material of fiber industry, and fabric, paper coating and impregnant etc..Dimethylbenzene is to eye and the upper respiratory tract There is stimulation, during high concentration, have anesthetic effect to cental system.Acute poisoning is may occur in which when sucking higher concentration in a short time. Long Term Contact can produce neurasthenia syndrome, and women is likely to result in menoxenia.Often there is dry skin, chap in skin contact Split, dermatitis etc..Therefore, the detection and alarm of paraxylene is of great practical significance.
The content of the invention
In order to solve the deficiencies in the prior art, the invention provides a kind of nano material and its preparation method and application.Tool Body provides a kind of method that microwave solvothermal method prepares tungstic acid and its presoma with special appearance in liquid-vapor interface, And only can just be provided by a kind of preparation method two kinds at a temperature of different operating paraxylene gas show excellent gas The sensitive material of quick characteristic.
The technical scheme is that：A kind of nano material, its structure is gear-like nanometer WO3Presoma or with centre The face nest shape nanometer WO in hole3Sintered product.
Further improvement of the present invention includes：
The gear-like nanometer WO3Presoma is obtained by following methods：With the ethylene glycol of small container measured amounts, accurately Weigh a certain amount of WCl6It is dissolved in ethylene glycol, is sufficiently stirred on magnetic stirring apparatus, solution is then placed in reaction in blackish green In tank, ammoniacal liquor and deionized water are added in small container outer wall, be put into reaction in microwave reaction instrument, obtain dark brown thick heavy Form sediment, black powder presoma is obtained after 105 DEG C of dryings, its SEM figure is shown as gear-like material.
Face nest shape nanometer WO with interstitial hole3Sintered product is obtained by following methods：With small container measured amounts Ethylene glycol, a certain amount of WCl of precise6Be dissolved in ethylene glycol, be sufficiently stirred on magnetic stirring apparatus, solution in blackish green, It is then placed in retort, ammoniacal liquor and deionized water is added in small container outer wall, be put into reaction in microwave reaction instrument, obtains dark brown The thick precipitation of color, after 105 DEG C of dryings black powder presoma, by 450-550 DEG C in atmosphere of obtained black presoma After calcining 2h, pale yellow powder is obtained, as the face nest shape nanometer WO of middle with hole3。
Said gear shape nanometer WO is prepared another object of the present invention is to provide one kind3The method of presoma, with small The ethylene glycol of container measured amounts, a certain amount of WCl of precise6It is dissolved in ethylene glycol, is fully stirred on magnetic stirring apparatus Mix, solution is then placed in retort in blackish green, ammoniacal liquor and deionized water are added in small container outer wall, be put into microwave reaction Reacted in instrument, obtain the thick precipitation of dark brown, black powder presoma is obtained after 105 DEG C of dryings, its SEM figure is shown as gear-like Material.
Tungsten hexachloride is dissolved into ethylene glycol solvent for tungsten source, with ammoniacal liquor as precipitating reagent, under stirring condition, using microwave plus Heat carries out reaction 50-80min to 170-190 DEG C in liquid-vapor interface, obtains the nanometer WO with gear-like3Presoma.
The above-mentioned face nest shape nanometer WO with interstitial hole is prepared present invention also offers a kind of3The method of sintered product, uses The ethylene glycol of small container measured amounts, a certain amount of WCl of precise6It is dissolved in ethylene glycol, on magnetic stirring apparatus fully Stirring, solution is then placed in retort in blackish green, and ammoniacal liquor and deionized water are added in small container outer wall, is put into microwave anti- Ying Yizhong reacts, and obtains the thick precipitation of dark brown, black powder presoma is obtained after 105 DEG C of dryings, by obtained black forerunner Body after 450-550 DEG C of calcining 2h, obtains pale yellow powder in atmosphere, as the face nest shape nanometer WO of middle with hole3。
Invention further provides a kind of application of above-mentioned nano material in dimethylbenzene gas sensor is prepared.
Described application is specifically that apertures WO is inserted in agate mortar3Nano particle, then instills distilled water, is tuned into The uniform earthenware outside for being applied to gas sensor, is placed in drying under infrared lamp after pasty state, after the direct drying at room temperature of precursor product, Tu Guan, is welded into heater-type gas sensor, aged at room temperature；Face nest shape nanometer WO after sintering3Product is in 450-500 DEG C of calcining 2h, is welded into heater-type gas sensor after natural cooling, aging 5 days, be made heater-type dimethylbenzene gas sensor.
Presoma and calcining of the present invention using microwave solvent thermal means in liquid-vapor interface reaction generation with gear structure Generation afterwards has the WO with hole face nest shape structure3Product paraxylene after nano material, and presoma and calcining exists respectively There is preferable air-sensitive performance at different temperature.The inventive method uses heating using microwave, and homogeneous heating, energy consumption is low, and reaction is fast, section Can, but due to the boiling point of ethylene glycol be 197.3 DEG C (maximum temperature of the present invention is 190 DEG C), and heating using microwave is from little Rong The ammonia that device outer wall is evaporated is insoluble in ethylene glycol, and reaction can only be carried out in liquid-vapor interface, entered using this liquid-vapor interface Row reaction, the material of acquisition is homogeneous, and particle is small, and pattern is unique, and the presoma and final product of acquisition can be used as two The gas sensitive of toluene is used under different operating temperatures, and experimentation does not add template etc., preparation process economy.
The advantage and feature of heater-type dimethylbenzene gas sensor obtained in the inventive method are as described below：
(1) preparation method uses microwave solvothermal method, and reactant and precipitating reagent are separated, in the feelings of heating using microwave Under condition so that reactant W6+Reacted in liquid-vapor interface with ammoniacal liquor, reaction is uniform, and the time is short, energy-conservation, process control.
(2) materials such as template and surfactant are not added in system of the present invention, but because reaction starts life Into W (OH)6It is amphiprotic substance, it is also possible to H2WO4Form is present, and thus has part H2WO4There is part with ethylene glycol Inorganic acid esterification, generating portion ester, and this part ester just and H2WO4WO produced by decomposing3Uniformly and closely combine Together, composite is generated, so the presoma of generation is actually a kind of nanometer WO3Composite, this composite wood The ester generated in experimentation in material is just subsequent calcination product band hole face nest shape nanometer WO3There is provided template, this template Generate during the course of the reaction, and eliminated by high-temperature calcination in subsequent products.
(3) gear-like presoma and band hole face nest shape nanometer WO prepared by3Paraxylene has good gas sensing property Can, presoma is composite, is suitably used at low temperature, and calcines the poroid nanometer WO of resulting tape after presoma3Be suitable for compared with High-temperature is used.The optimum working temperature of presoma is 30 DEG C, and to the sensitivity of 100ppm dimethylbenzene up to 32, the response time is 12s, recovery time is 15s；Band hole face nest shape nanometer WO3Optimum working temperature is 80 DEG C, the sensitivity to 100ppm dimethylbenzene Up to 113, response and recovery time are respectively 9s and 12s, and this two temperatures point to benzene, toluene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO, therefore, obtained dimethylbenzene sensor has sensitivity high, and selectivity is good, response/extensive The advantages of time is short again.
Brief description of the drawings
Fig. 1 is the XRD of product after prepared presoma and calcining；
Fig. 2 is presoma SEM figures；
Fig. 3 is nanometer WO after calcining3SEM figure；
Fig. 4 a are sensitivity curve of the gear-like presoma to 100ppm dimethylbenzene at a temperature of different operating；
Fig. 4 b are band hole face nest shape nanometer WO3To sensitivity curve of the 100ppm dimethylbenzene at a temperature of different operating；
Fig. 5 a are response-recovery curve of the gear-like presoma to 100ppm dimethylbenzene at 30 DEG C；
Fig. 5 b are band hole face nest shape nanometer WO3Response-recovery curve to 100ppm dimethylbenzene at 80 DEG C.
Specific embodiment
The present invention is elaborated below in conjunction with the accompanying drawings.
The present invention is that a kind of preparation in liquid-vapor interface based on microwave solvothermal method has the nano tungsten trioxide of middle with hole There are the precursor species of gear structure with it, it is characterised in that with following technical process and step：
A. gear-like nanometer WO3The preparation of presoma：
With the ethylene glycol of small container measured amounts, a certain amount of WCl of precise6It is dissolved in ethylene glycol, is stirred in magnetic force Mix and be sufficiently stirred on device, solution is then placed in retort in blackish green, ammoniacal liquor and deionized water are added in small container outer wall, Reaction in microwave reaction instrument is put into, the thick precipitation of dark brown is obtained, black powder precursor samples, SEM are obtained after 105 DEG C of dryings Figure is shown as gear-like material.
B. there is middle hole face nest shape nanometer WO3Preparation：
After by black precursor samples in atmosphere 450-550 DEG C of calcining 2h, sample is pale yellow powder, and what is obtained is Between face nest shape nanometer WO with holes3。
Application of the present invention in dimethylbenzene gas sensor is prepared；Its manufacture method is as follows：Inserted in agate mortar few The powder sample of perhaps above-mentioned preparation, the earthenware outside for being uniformly applied to gas sensor is tuned into after pasty state with water, will scribble sensitive material The earthenware of material is placed on after drying under infrared lamp, forerunner's body sensor 80 DEG C of aging 5 days, and WO after calcining in an oven3Sample Product sensor calcines 2h for 450-550 DEG C again in Muffle furnace, standby after natural cooling.Finally its 4 wire electrodes and 2 are heated Wire bond is connected on base, and the element that will be welded is placed on special agingtable, aging 5 days, is made dimethylbenzene gas sensor.
Embodiment one
40ml ethylene glycol (EG), the WCl of precise 1.7850g are taken with 50ml beakers6It is dissolved in ethylene glycol, stirs 1h, Solution is then placed in retort in blackish green, outside beaker, 1.8ml ammoniacal liquor and 15ml deionized waters is added in retort, is put After entering be warmed up in 20min in microwave reaction instrument 170 DEG C of reaction 80min, natural cooling.Solution is in sepia in beaker, is had Obvious uniform flocculent deposit generation, centrifuge washing is dried, and sample is in black powder, forerunner in gained Powder XRD pattern such as Fig. 1 Shown in body collection of illustrative plates, mutually retrieved through jade6.5 things and be consistent with PDF card number 85-2459 things, be hexagonal crystal phase WO3, crystallinity is good It is good, calculate WO through Scherrer formula3Grain size size is 19.37nm.Gained scanning electron microscopic picture is as shown in Fig. 2 be gear-like；Powder Heater-type gas sensor is painted in end through uniformly mixing with water, dries, 80 DEG C of laggard quick performance tests of promoting the circulation of qi in aging 5 days in baking oven, As shown in fig. 4 a, optimum working temperature is 30 to the relation curve of its response sensitivity to 100ppm dimethylbenzene and operating temperature DEG C, at 30 DEG C,, to 100ppm dimethylbenzene sensitivity up to 32, as shown in Figure 5 a, the response time is its response-recovery curve for it 12s, recovery time is 15s, to benzene, toluene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO.
Embodiment two
After to forerunner's composite material in atmosphere 550 DEG C of calcining 2h, sample is changed into pale yellow powder, XRD spectrum completely After as calcined in Fig. 1 shown in product collection of illustrative plates, mutually retrieved through jade6.5 things and be consistent with PDF card number 83-0950 things, be WO3It is single Oblique crystalline phase, crystallinity is good, and WO is calculated through Scherrer formula3Grain size size is 28.82nm.Gained scanning electron microscopic picture such as Fig. 3 It is shown, it is the face nest shape material of middle with hole；Powder paints heater-type gas sensor through uniformly mixing with water, dries, 550 DEG C Calcining 2h, natural cooling take out, the laggard quick performance test of promoting the circulation of qi in aging 5 days, its response sensitivity to 100ppm dimethylbenzene with As shown in Figure 4 b, optimum working temperature is 80 DEG C to the relation curve of operating temperature, and at 80 DEG C, it is sensitive to 100ppm dimethylbenzene Up to 113, as shown in Figure 5 b, response and recovery time are respectively 9s and 12s to its response-recovery curve to degree, to benzene, toluene, second Alcohol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO.
Embodiment three
40ml ethylene glycol (EG), the WCl of precise 1.7850g are taken with 50ml beakers6It is dissolved in ethylene glycol, stirs 1h, Solution is then placed in retort in blackish green, outside beaker, 1.8ml ammoniacal liquor and 15ml deionized waters is added in retort, is put After entering be warmed up in 20min in microwave reaction instrument 190 DEG C of reaction 50min, natural cooling.Have obvious uniform cotton-shaped in beaker Precipitation generation, centrifuge washing is dried, and sample is in black powder, and powder paints heater-type gas sensor through uniformly mixing with water, dries Dry, 80 DEG C of laggard quick performance tests of promoting the circulation of qi in aging 5 days in baking oven, its optimum working temperature to 100ppm dimethylbenzene is 30 DEG C, At 30 DEG C,, to 100ppm dimethylbenzene sensitivity up to 28, its response time is 14s, and recovery time is 18s, to benzene, first for it Benzene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO.
Example IV
After to forerunner's composite material in atmosphere 450 DEG C of calcining 2h, sample is changed into pale yellow powder completely, through XRD Spectrum is verified as WO3Monocline crystalline phase, crystallinity is good；Powder paints heater-type gas sensor through uniformly mixing with water, dries, 450 DEG C calcining 2h, natural cooling take out, the laggard quick performance test of promoting the circulation of qi in aging 5 days, its best effort temperature to 100ppm dimethylbenzene It is 80 DEG C to spend, at 80 DEG C, its to 100ppm dimethylbenzene sensitivity up to 105, its response and recovery time be respectively 11s and 15s, to benzene, toluene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO.
Embodiment five
40ml ethylene glycol (EG), the WCl of precise 1.7850g are taken with 50ml beakers6It is dissolved in ethylene glycol, stirs 1h, Solution is then placed in retort in blackish green, outside beaker, 1.8ml ammoniacal liquor and 15ml deionized waters is added in retort, is put After entering be warmed up in 20min in microwave reaction instrument 180 DEG C of reaction 80min, natural cooling.Solution is in sepia in beaker, is had Obvious uniform flocculent deposit generation, centrifuge washing is dried, and sample is presoma in black powder.Gained scanning electron microscopic picture shows It is shown as gear-like；Powder paints heater-type gas sensor through uniformly mixing with water, dries, and 80 DEG C are carried out after aging 5 days in baking oven Air-sensitive performance is tested, the relation curve of its response sensitivity to 100ppm dimethylbenzene and operating temperature as shown in fig. 4 a, most preferably Operating temperature be 30 DEG C, at 30 DEG C, its to 100ppm dimethylbenzene sensitivity up to 32, its response-recovery curve such as Fig. 5 a institutes Show, the response time is 12s, recovery time is 15s, to benzene, toluene, ethanol, acetone, formaldehyde, H2With the response of the gas such as CO very It is small.
Embodiment six
After to forerunner's composite material in atmosphere 500 DEG C of calcining 2h, sample is changed into pale yellow powder completely, warp Jade6.5 things are mutually retrieved and are consistent with PDF card number 83-0950 things, are WO3Monocline crystalline phase, crystallinity is good, through Scherrer formula Calculate WO3Grain size size is 28.82nm.Gained scanning electron microscopic picture is shown as the face nest shape material of middle with hole；Powder is passed through Uniformly mix with water, paint heater-type gas sensor, dry, 500 DEG C of calcining 2h, natural cooling is taken out, aging laggard promoting the circulation of qi in 5 days Quick performance test, to benzene, toluene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO.
The advantage and feature of heater-type dimethylbenzene gas sensor obtained in the inventive method are as described below：
(1) preparation method uses microwave solvothermal method, and reactant and precipitating reagent are separated, in the feelings of heating using microwave Under condition so that reactant W6+Reacted in liquid-vapor interface with ammoniacal liquor, reaction is uniform, and the time is short, energy-conservation, process control.
(2) materials such as template and surfactant are not added in system of the present invention, but because reaction starts life Into W (OH)6It is amphiprotic substance, it is also possible to H2WO4Form is present, and thus has part H2WO4There is part with ethylene glycol Inorganic acid esterification, generating portion ester, and this part ester just and H2WO4WO produced by decomposing3Uniformly and closely combine Together, composite is generated, so the presoma of generation is actually a kind of nanometer WO3Composite, this composite wood The ester generated in experimentation in material is just subsequent calcination product band hole face nest shape nanometer WO3There is provided template, this template Generate during the course of the reaction, and eliminated by high-temperature calcination in subsequent products.
(3) gear-like presoma and band hole face nest shape nanometer WO prepared by3Paraxylene has good gas sensing property Can, presoma is composite, is suitably used at low temperature, and calcines the poroid nanometer WO of resulting tape after presoma3Be suitable for compared with High-temperature is used.The optimum working temperature of presoma is 30 DEG C, and to the sensitivity of 100ppm dimethylbenzene up to 32, the response time is 12s, recovery time is 15s；Band hole face nest shape nanometer WO3Optimum working temperature is 80 DEG C, the sensitivity to 100ppm dimethylbenzene Up to 113, response and recovery time are respectively 9s and 12s, and this two temperatures point to benzene, toluene, ethanol, acetone, formaldehyde, H2Equal very little is responded with the gas such as CO, therefore, obtained dimethylbenzene sensor has sensitivity high, and selectivity is good, response/extensive The advantages of time is short again.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The technology of the industry Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its Equivalent thereof.

Claims (4)

1. a kind of gear-like nanometer WO3The preparation method of presoma, it is characterised in that use the ethylene glycol of small container measured amounts, A certain amount of WCl of precise6It is dissolved in ethylene glycol, is sufficiently stirred on magnetic stirring apparatus, solution is then placed in blackish green In retort, ammoniacal liquor and deionized water are added in small container outer wall, be put into reaction in microwave reaction instrument, using heating using microwave extremely 170-190 DEG C carries out reaction 50-80min in liquid-vapor interface, obtains the thick precipitation of dark brown, and black powder is obtained after 105 DEG C of dryings Last presoma, its SEM figure is shown as gear-like material.
2. a kind of face nest shape nanometer WO with interstitial hole3The preparation method of sintered product, it is characterised in that measured with small container A certain amount of ethylene glycol, a certain amount of WCl of precise6It is dissolved in ethylene glycol, is sufficiently stirred on magnetic stirring apparatus, solution is in It is blackish green, it is then placed in retort, ammoniacal liquor and deionized water are added in small container outer wall, reaction in microwave reaction instrument is put into, Reaction 50-80min is carried out in liquid-vapor interface to 170-190 DEG C using heating using microwave, the thick precipitation of dark brown, 105 DEG C is obtained After drying black powder presoma, by obtained black presoma in atmosphere 450-550 DEG C calcining 2h after, obtain faint yellow The face nest shape nanometer WO of powder, as middle with hole3。
3. a kind of nano material, it is characterised in that be obtained according to claim 1 methods described.
4. a kind of nano material, it is characterised in that be obtained according to claim 2 methods described.
CN201610032681.9A 2016-01-18 2016-01-18 A kind of nano material and its preparation method and application Expired - Fee Related CN105668638B (en)

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FR3089969B1 (en) * 2018-12-13 2023-02-24 Genesink Synthesis method of tungsten oxide nanoparticles
CN110237838A (en) * 2019-05-06 2019-09-17 张红 A kind of preparation method of oxygen defect enhancing light absorption type tungsten oxide material
CN110227445A (en) * 2019-06-28 2019-09-13 暨南大学 A kind of WO3-xNano wire and the preparation method and application thereof
CN113511683A (en) * 2020-04-10 2021-10-19 中国石油化工股份有限公司 WO3Nanowire, preparation method thereof and gas sensor
CN115112318A (en) * 2022-06-21 2022-09-27 武汉铂纳智感科技有限公司 Self-luminous photoelectric combined excitation lithium battery leakage monitoring sensor
CN115128134A (en) * 2022-06-21 2022-09-30 武汉铂纳智感科技有限公司 Gas sensor based on optical excitation, preparation method and application
CN116145286B (en) * 2023-01-03 2024-05-10 吉林大学 Cobalt-based nanofiber sensitive material capable of effectively detecting ultralow-concentration xylene at low working temperature, preparation method and application

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CN103301832A (en) * 2013-07-08 2013-09-18 西北师范大学 Preparation of tungsten trioxide photocatalyst in porous structure, and application of tungsten trioxide photocatalyst to sewage treatment
CN103896338A (en) * 2014-03-24 2014-07-02 上海大学 Method for preparing tungsten trioxide with regular hexagonal flaky morphology by using template method and application thereof

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